Citation: Maignan, A; Van Tendeloo, G; Hervieu, M; Michel, C; Raveau, B (1993). A new "1212" mercury-based 90K superconductor: Y~0.6~Ca~0.4~Ba~2~(Hg~1- x~M~x~)Cu~2~O~6+y~. Physica C (Amsterdam) (152,1988-), 212, pp. 239-244.
Formula: Ba2 Ca0.4 Cu2 Hg0.73 O6.6 Y0.6
Chemical name:Yttrium calcium barium mercury copper oxide (0.6/0.4/2/0.7/2/6.6)